I was just visiting Google Play Games Services guide for signing In in Unity. I just came to know there that Google Play Games also provide services for Multiplayer. I'm currently working on my Indie "Turn Based" Multiplayer game using Unity and was thinking to use Firebase. (Photon seems to be very expensive as compared to the revenue I estimate from expected number of users). I could not get pricing details from the guide. So, my questions are: a) Is GPGS (for Unity) Multiplayer free? b) Is there any limitation of number of users (if its free)? c) Do I need to host the GPGS services on my own server?
Just "extra" question -> If GPGS Multiplayer services is free, no limitations of users and hosted by GPGS itself (if these are true), why is Google providing this sophisticated feature for free?